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Further optimize the inner loop

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This commit is contained in:
Neil Booth 2016-11-27 07:58:13 +09:00
parent 5c0b026158
commit f9cc21807f
1 changed files with 11 additions and 6 deletions
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17
server/block_processor.py
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@ -224,6 +224,7 @@ class BlockProcessor(server.db.DB):
if self.caught_up:
# Flush everything as queries are performed on the DB and
# not in-memory.
await asyncio.sleep(0)
self.flush(True)
self.client.notify(touched)
elif time.time() > self.next_cache_check:
@ -498,43 +499,47 @@ class BlockProcessor(server.db.DB):
self.write_undo_info(self.height, b''.join(undo_info))
def advance_txs(self, tx_hashes, txs, touched):
put_utxo = self.utxo_cache.__setitem__
spend_utxo = self.spend_utxo
undo_info = []
# Use local vars for speed in the loops
history = self.history
history_size = self.history_size
tx_num = self.tx_count
script_hash168 = self.coin.hash168_from_script()
s_pack = pack
put_utxo = self.utxo_cache.__setitem__
spend_utxo = self.spend_utxo
undo_info_append = undo_info.append
for tx, tx_hash in zip(txs, tx_hashes):
hash168s = set()
add_hash168 = hash168s.add
tx_numb = s_pack('<I', tx_num)
# Spend the inputs
if not tx.is_coinbase:
for txin in tx.inputs:
cache_value = spend_utxo(txin.prev_hash, txin.prev_idx)
undo_info.append(cache_value)
hash168s.add(cache_value[:21])
undo_info_append(cache_value)
add_hash168(cache_value[:21])
# Add the new UTXOs
for idx, txout in enumerate(tx.outputs):
# Get the hash168. Ignore unspendable outputs
hash168 = script_hash168(txout.pk_script)
if hash168:
hash168s.add(hash168)
add_hash168(hash168)
put_utxo(tx_hash + s_pack('<H', idx),
hash168 + tx_numb + s_pack('<Q', txout.value))
for hash168 in hash168s:
history[hash168].append(tx_num)
self.history_size += len(hash168s)
history_size += len(hash168s)
touched.update(hash168s)
tx_num += 1
self.tx_count = tx_num
self.history_size = history_size
return undo_info